JSP实现远程文件下载保存到服务器指定目录中的方法
本文实例讲述了JSP实现远程文件下载保存到服务器指定目录中的方法。分享给大家供大家参考，具体如下：
<%@pageimport="java.net.*,java.io.*"%>
<%!
publicbooleansaveUrlAs(StringphotoUrl,StringfileName){
//此方法只能用户HTTP协议
try{
URLurl=newURL(photoUrl);
HttpURLConnectionconnection=(HttpURLConnection)url.openConnection();
DataInputStreamin=newDataInputStream(connection.getInputStream());
DataOutputStreamout=newDataOutputStream(newFileOutputStream(fileName));
byte[]buffer=newbyte[4096];
intcount=0;
while((count=in.read(buffer))>0){
out.write(buffer,0,count);
}
out.close();
in.close();
returntrue;
}
catch(Exceptione){
returnfalse;
}
}
publicStringgetDocumentAt(StringurlString){
//此方法兼容HTTP和FTP协议
StringBufferdocument=newStringBuffer();
try{
URLurl=newURL(urlString);
URLConnectionconn=url.openConnection();
BufferedReaderreader=newBufferedReader(newInputStreamReader(conn.
getInputStream()));
Stringline=null;
while((line=reader.readLine())!=null){
document.append(line+"\n");
}
reader.close();
}
catch(MalformedURLExceptione){
System.out.println("UnabletoconnecttoURL:"+urlString);
}
catch(IOExceptione){
System.out.println("IOExceptionwhenconnectingtoURL:"+urlString);
}
returndocument.toString();
}
%>
<%
//测试
StringphotoUrl="http://ad4.sina.com.cn/200601/12/43932_750450.jpg";
StringfileName=photoUrl.substring(photoUrl.lastIndexOf("/"));
StringfilePath="C:/test/";
booleanflag=saveUrlAs(photoUrl,filePath+fileName);
out.println("Runok!\n<BR>GetURLfile"+flag);
%>
希望本文所述对大家JSP程序设计有所帮助。